Chuck



oct. 17, 1933.

R. R. sEARLEs CHUCK Filed Jan. '7, 1931 KKKK trl- ATTORNEYS.

patented ca. 17,1933- i I e 1,931,3277

UNITED STATES PATENT OFFICE( i s l I ,.iLesLszvf y l j l r v onUoK. Raymond R. `S'eafrles, `New Britain, Conn., assignor to `The Fafnr BearingCompany, `New f Britain, Conn., va ct`i`l'poration of o'nnecticut A r Application January 7, 19331,;.sqgtiaimncv v597,184. Claims. (Cl. 279-l-46) My invention relates to a gripping device, such permanently secured to theV rod 13, andV when as a chuck or vise, and more particularly to means a removable wrench 15 is to be employed the for flexing a diphragm gripping device of the upper end of the rod 15 is provided with `a suitgeneral type set forth in Scaife Patent No. able socket, as will be understood. `The rotat- 51,389,272, dated August 30, 1921. i able Operating rodV 13 actuates means for exing cop It is an object of the invention to provide a the diaphragm. l gripping device of the character indicated, which In the formillustrated I employ a cam memis compact and simple in 'construction and which ber, more speciiically an eccentric 16, pinned or, is quick'in its action. otherwise secured tothe rod 13. With the cam It is another object to provide a gripping demember positioned as illustrated in the drawingye' vice of the character indicated having improved the diaphragm is in such position that the spring operating means for quickly actuating the diaof the metal has caused the gripping jaws`8--8 phragm, and comprising few and simple parts. to grip the work piece 11. When the cam mem- Other objects and features of the invention will ber, such as the eccentric 16, `is rotated it en- 15be hereinafter pointed vout or will become gages the diaphragm 6 and springs the `latter'mj,` f

apparent. outwardly or to the right as viewed in-thedraw- In the drawing which show, for illustrative ing. This flexure of the diaphragm causes the purposes only, preferred forms of the invengripping jaws 8 8 to separate and permits the tionremoval ofthe work piece 11 and the insertion Fig. 1 is a side view in partial central section of a new work piece. It will beclear that, with 75; illustratingy a gripping device embodied in a a` suitably formed cam such as the eccentric, vise; the rod 13 may be turned to such position that Fig. 2 iS a Central Sectional VieW 0f a gripping the eccentric will be on dead center and will device similar to that shown in Fig. 1 but illushold the diaphragm in outwardly flexed posi- "Ktratihg a diierent manual operator. tion, so' as to maintain the jaws open, even 80g. -v

Y In said drawing, 5 indicatesa body, which may though the handle 14 or wrench 15 be released. be part of a chuck body designed for attachment In the specific form shown the gripping is to a spindle and therefore rotatable, or it may effected by the spring lback-of the diaphragm. be fixed, as on a turret or bench, S0 aS 110i? 150 be It will -be clear without illustration that if it is retatable relatively t0 its Support A diaphragm desired to positively move the diaphragm in the 85; 6 is Secured t0 the bOdy 5y aS by means 0f SCIeWS, gripping direction, the cam or eccentric could such as '7. Grippng J'eWS 8-3 are formed be engageable with a yoke xedly attached to integral with orare secured to the diaphragm. the diaphragm, so that `mtwcmcnt ofv the cam as by means 0f screws, Such ase. and dOWelS, or eccentric 16 would positively draw the dia- `such as v10. The gripping jaws herein illustrated phragm rearwardly in the gripping direction. 90; are for external gripping of the Work piece, such By the use of an eccentric cam there is ar as a bearing 11mg 11' Clarly the Jaws could be self-contained predetermined'limit to the throw arranged for Internal gmppmg thereoLand accordingly'the danger of overexof a ri ht, the external gri ping jaws 8 8 are sepa- ,Y

ragted so as to release) the Work piece 11, and .addltlfn to those already set forthr when the diaphragm moves to the left, the grip .I While the invention has. been described 1n conping jaws 3 3 serve to grip the Work piece, Anyv s1derable detail and specific forms shown, 1 t 1s 4,5V4 suitable stop means, such as stop pins 12, may be t0 be U-iideliioed` that Ver1011S Cam formations roo provided for meatmg the Work piece 11 relatively. and various arrangements of different cams and to the gripping device in general, whether it be a, various embodiments of the invention may be chuck or a vise. made, all Within the Ascope of the invention as My invention relates particularly to means for dened in the appended claims. flexing the diaphragm. In the form` shown I I claim: 195

Provide an Operating T061 13, Which iS suitably 1. In a device of the character indicated, a

jOurnaled in thebody 5, and which rOd 13 may body, a diaphragm secured thereto, gripping jaws be manually operated by a handle 14, as illuscarried by the said diaphragm, said body having treted in Fig `1, 01 by a removable wrench 15, `a chamber immediately adjacent said diaphragm, .551i as illustrated in Fig. 2. The handle 14 may be i cam means located in said chamber for flexing 1:10-

thereto is prevented, this advantage being in g said diaphragm, and means for rotating said cam means.

2. In a device of the character indicated, a body,a diaphragm secured thereto, gripping jaws carried by said diaphragm, a rotatable Vcam member Within said body, and means secured to said cam member and'extending substantially radially to the outside of said body for rotating said cam member, said cam member being operatively positioned foriiexing said diaphragm. c

3. vIn a device of the character indicated, a

diaphragm, gripping jaws carried by said dia-y phragm, a rotatable cam member'immediately adjacent one side of said diaphragm and pivotally mounted on an axis substantially parallel' to said diaphragm, and means for rotating said cam member for flexing said diaphragm.

`4. In a device of the character indicated, af

rfrom the outside of said body, and means carried directlyby said rod and rotatable therewith for flexing said diaphragm.

RAYMOND R. SEARLES. 

